Core/DBLayer: Escape more keywords

src/server/game/Spells/SpellMgr.cpp

@@ -861,7 +861,7 @@ void SpellMgr::LoadSpellRanks()
     uint32 oldMSTime = getMSTime();
 
     //                                                     0             1      2
-    QueryResult result = WorldDatabase.Query("SELECT first_spell_id, spell_id, rank from spell_ranks ORDER BY first_spell_id, rank");
+    QueryResult result = WorldDatabase.Query("SELECT first_spell_id, spell_id, `rank` from spell_ranks ORDER BY first_spell_id, rank");
 
     if (!result)
     {